13387929 has 4 divisors (see below), whose sum is σ = 17850576. Its totient is φ = 8925284.

The previous prime is 13387919. The next prime is 13387931. The reversal of 13387929 is 92978331.

13387929 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13387929 - 2⁵ = 13387897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13387919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231319 + ... + 2231324.

It is an arithmetic number, because the mean of its divisors is an integer number (4462644).

Almost surely, 2^13387929 is an apocalyptic number.

It is an amenable number.

13387929 is a deficient number, since it is larger than the sum of its proper divisors (4462647).

13387929 is an equidigital number, since it uses as much as digits as its factorization.

13387929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462646.

The product of its digits is 81648, while the sum is 42.

The square root of 13387929 is about 3658.9518991099. The cubic root of 13387929 is about 237.4494311542.

The spelling of 13387929 in words is "thirteen million, three hundred eighty-seven thousand, nine hundred twenty-nine".